Guava StopWatch use causing dependency issue

[ehsanhaq]

I am trying to use magellan in my project which require guava 20. Magellan is using guava 14.0.1. Specifically I am having the following exception.

java.lang.IllegalAccessError: tried to access method com.google.common.base.Stopwatch.()V from class magellan.mapreduce.ShapeInputFormat
at magellan.mapreduce.ShapeInputFormat.computeSplits(ShapeInputFormat.scala:50)
at magellan.mapreduce.ShapeInputFormat.getSplits(ShapeInputFormat.scala:43)
at org.apache.spark.rdd.NewHadoopRDD.getPartitions(NewHadoopRDD.scala:125)
at org.apache.spark.rdd.RDD$$anonfun$partitions$2.apply(RDD.scala:252)
at org.apache.spark.rdd.RDD$$anonfun$partitions$2.apply(RDD.scala:250)
at scala.Option.getOrElse(Option.scala:121)

The root cause is that the Stopwatch constructor is deprecated in the guava 15 onwards, which is used in ShapeInputFormat.

Bumping the guava version is not a solution either because it will have conflict with the hadoop 2.2.

I have created a PR #221 to address the issue by using apache commons lang3 StopWatch class. One could also just use System.getTime as well.